Comparison of robot-assisted and manual retinal vessel microcannulation in an animal model

Department of Ophthalmology, School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
The British journal of ophthalmology (Impact Factor: 2.98). 12/2010; 95(5):731-4. DOI: 10.1136/bjo.2010.193391
Source: PubMed


To evaluate the performance of a parallel robotic system by comparison with the conventional manual procedure using an animal model.
A new parallel robotic system was developed that features a small cylindrical manipulator (base diameter 76 mm, height 240 mm). The performance of the new system was evaluated for its capability to assist in retinal vessel microcannulation. The test scenario was as follows: (1) introduce the microcannula into a harvested porcine eye attached loosely on the orbital fossa of an artificial face model through a 20G scleral port at the pars plana; (2) cannulate the retinal vessels (inner diameter 60-80 μm); and (3) inject indocyanine green dye into the eye endovascularly. The success rate and procedure quality of the robotic system were evaluated by comparison with the conventional manual procedure.
Retinal vessel microcannulation and dye injection were achieved by the robotic system twice in four attempts, and by the conventional manual procedure either not at all or incompletely in all six attempts. Dye leakage was not observed with the robotic system, indicating that microcannulation was minimally invasive; in contrast, dye leakage was always observed with the manual procedure.
The new system is more accurate than the conventional manual procedure for the tests on a porcine eye model.

17 Reads
  • [Show abstract] [Hide abstract]
    ABSTRACT: A systematic review of the literature concerning robotic surgery in oral and maxillofacial (OMF), craniofacial and head and neck surgery was performed. The objective was to give a clear overview of the different anatomical areas of research in the field of OMF, craniofacial and head and neck surgery, in all its fields (pre-clinical and clinical). The present indications are outlined and the critical reader is invited to assess the value of this new technology by highlighting different relevant parameters. A PubMed and Cochrane library search yielded 838 papers published between 1994 and 2011. After screening the abstracts, 202 articles were considered clinically or technically relevant and were included. These full papers were screened in detail and classified as articles on synopsis (n=41), educational aspects (n=3), technical/practical aspects (n=11) and clinical papers (n=147). Regarding clinical feasibility this systematic review revealed the following main indications: transoral robotic surgery (TORS) for upper digestive and respiratory tract lesions; TORS for skull base surgery; and TORS for trans-axillary thyroid and endocrine surgery. Regarding functional outcome, this systematic review revealed a promising reduction of morbidity in patients with cancer of the upper digastric and respiratory tract.
    No preview · Article · Aug 2012 · International Journal of Oral and Maxillofacial Surgery
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Purpose To elucidate the merits of robotic application for vitreoretinal maneuver in comparison to conventional manual performance using an in-vitro eye model constructed for the present study. Methods Capability to accurately approach the target on the fundus, to stabilize the manipulator tip just above the fundus, and to perceive the contact of the manipulator tip with the fundus were tested. The accuracies were compared between the robotic and manual control, as well as between ophthalmologists and engineering students. Results In case of manual control, ophthalmologists were superior to engineering students in all the 3 test procedures. Robotic assistance significantly improved accuracy of all the test procedures performed by engineering students. For the ophthalmologists including a specialist of vitreoretinal surgery, robotic assistance enhanced the accuracy in the stabilization of manipulator tip (from 90.9 µm to 14.9 µm, P = 0.0006) and the perception of contact with the fundus (from 20.0 mN to 7.84 mN, P = 0.046), while robotic assistance did not improve pointing accuracy. Conclusions It was confirmed that telerobotic assistance has a potential to significantly improve precision in vitreoretinal procedures in both experienced and inexperienced hands.
    Full-text · Article · Jan 2013 · PLoS ONE